GESTRA LRGT 16-3 User Manual

Installation & Operating Manual
EN
English
Conductivity Controller LRR
Visual Display and Operating Unit URB
LRR 1-52
LRR 1-53
URB 55
850645-01

GESTRA LRGT 16-3 Specifications

General

Operating temperature	-40°C to +150°C
Output Signal	4…20 mA / HART
Electrical Connection	M20 x 1.5
Material	Stainless steel
Application	Level monitoring and control in tanks and vessels

Summary

Basic safety notes

Function

Technical data (LRR 1-52, LRR 1-53)

Technical data (URB 55)

Factory settings (LRR 1-52, LRR 1-53)

Factory settings (URB 55)

Installing the LRR 1-52, LRR 1-53 conductivity controller

Required installation aperture

Installing the URB 55

Connecting the URB 55

Ports and sockets on the back

24 V DC supply voltage connection

Details the pin assignment for connecting the 24 V DC power supply to the URB 55.

Data line connection (URB 55 to LRR)

Explains the pin assignment for the data cable connecting URB 55 and LRR controllers.

Safety notes for electrical connection

Wiring diagram (LRR 1-52)

Connecting LRG 1x-xx electrodes

Shows the wiring connections for LRG 1x-xx conductivity electrodes to the LRR 1-52.

Connecting LRG 16-9 electrode

Illustrates the wiring connections for the LRG 16-9 conductivity electrode to the LRR 1-52.

Wiring diagram (LRR 1-53)

Connecting LRGT 1x-x transmitter

Shows the wiring connections for an LRGT 1x-x conductivity transmitter to the LRR 1-53.

Electrical connection (LRR 1-52, LRR 1-53)

24 V DC power supply connection

Details how to connect the 24 V DC power supply to the LRR controllers.

Analog output connection (4-20 mA)

Output contacts connection (MIN/MAX/CLOSED/OPEN)

Explains the connection of output contacts for MIN/MAX alarms and valve control.

Standby input and potentiometer connection

Connecting conductivity electrodes and transmitters

Guides the connection of various LRG electrodes and LRGT transmitters to the LRR.

Connecting the data line (Controller to URB 55)

Changing equipment settings

Code switch settings

Explains the functionality of each position of the code switch for configuring the controller.

Visual display and operating unit (URB 55)

Switching on the supply voltage

Operation and navigation

User interface overview

Parameter input with password protection

Explains how password protection works and how to set or change the password.

Entering parameters with the virtual keypad

Details how to input values using the on-screen virtual keypad, including limits and function keys.

Icons and functions (LRR 1-52, LRR 1-53)

Home screen of the LRR conductivity controller

Alarms and error messages

Alarm History overview

Describes how to access the full list of stored alarms and their retention cycle.

Opening and displaying the alarm list

Guides on accessing the list of active alarms and understanding their display format.

System settings

Password management

Network settings

Password management

Network settings

Data exchange via Modbus TCP

VNC server / Remote software

Configuring the conductivity controller

Setting MIN/MAX switchpoints and set point

Guides on setting the conductivity limits and the desired set point value.

Trend log

Testing relays

Continuous blowdown valve settings

Setting flushing interval and time

Calibrating feedback potentiometer for valve position

Calibrating the conductivity electrode

Parameter descriptions (Damping, Correction Factor C)

Measuring range and temperature compensation

Setting correction factor C

Setting the measuring range (LRR 1-52)

Setting the measuring range (LRR 1-53)

Setting the control parameters

Guide to setting control parameters

Setting automatic intermittent blowdown

Parameter descriptions for intermittent blowdown

System malfunctions (URB 55)

Fault codes for LRR controllers

Lists fault codes for LRR controllers, their possible causes, and remedies.

Common faults and issues (URB 55)

System malfunctions (LRR 1-52, LRR 1-53)

Troubleshooting checklist (Installation, Wiring, Configuration)

Provides a checklist for verifying installation, wiring, and controller configuration before troubleshooting.

Troubleshooting system malfunctions

Checking installation and function after remediation